f14fb60209
* Updating common/lib * Updating lib/csu * Updating lib/libc * Updating libexec/ld.elf_so * Corrected test on __minix in featuretest to actually follow the meaning of the comment. * Cleaned up _REENTRANT-related defintions. * Disabled -D_REENTRANT for libfetch * Removing some unneeded __NBSD_LIBC defines and tests Change-Id: Ic1394baef74d11b9f86b312f5ff4bbc3cbf72ce2
95 lines
2.4 KiB
C
95 lines
2.4 KiB
C
/* $NetBSD: strtof.c,v 1.5 2011/06/20 09:11:17 mrg Exp $ */
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/****************************************************************
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The author of this software is David M. Gay.
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Copyright (C) 1998, 2000 by Lucent Technologies
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and
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its documentation for any purpose and without fee is hereby
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granted, provided that the above copyright notice appear in all
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copies and that both that the copyright notice and this
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permission notice and warranty disclaimer appear in supporting
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documentation, and that the name of Lucent or any of its entities
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not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior
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permission.
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LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
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IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
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SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
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IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
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THIS SOFTWARE.
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****************************************************************/
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/* Please send bug reports to David M. Gay (dmg at acm dot org,
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* with " at " changed at "@" and " dot " changed to "."). */
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#include "namespace.h"
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#include "gdtoaimp.h"
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#ifdef __weak_alias
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__weak_alias(strtof, _strtof)
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#endif
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float
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#ifdef KR_headers
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strtof(s, sp) CONST char *s; char **sp;
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#else
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strtof(CONST char *s, char **sp)
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#endif
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{
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static CONST FPI fpi0 = { 24, 1-127-24+1, 254-127-24+1, 1, SI };
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ULong bits[1];
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Long expt;
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int k;
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union { ULong L[1]; float f; } u;
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#ifdef Honor_FLT_ROUNDS
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#include "gdtoa_fltrnds.h"
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#else
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#define fpi &fpi0
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#endif
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k = strtodg(s, sp, fpi, &expt, bits);
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if (k == STRTOG_NoMemory) {
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errno = ERANGE;
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return HUGE_VALF;
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}
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switch(k & STRTOG_Retmask) {
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case STRTOG_NoNumber:
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case STRTOG_Zero:
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u.L[0] = 0;
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break;
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case STRTOG_Normal:
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case STRTOG_NaNbits:
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u.L[0] = (bits[0] & 0x7fffff) | ((expt + 0x7f + 23) << 23);
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break;
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case STRTOG_Denormal:
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u.L[0] = bits[0];
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break;
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case STRTOG_Infinite:
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u.L[0] = 0x7f800000;
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break;
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case STRTOG_NaN:
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u.L[0] = f_QNAN;
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break;
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default:
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u.L[0] = 0; /* for gcc warning */
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break;
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}
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if (k & STRTOG_Neg)
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u.L[0] |= 0x80000000L;
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return u.f;
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}
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